Measurement of the W±Z boson pair-production cross section in pp collisions at s=13 TeV with the ATLAS detector
Number of Authors: 2864
2016 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 762, 1-22 p.Article in journal (Refereed) Published
The production of W±Z events in proton–proton collisions at a centre-of-mass energy of 13 TeV is measured with the ATLAS detector at the LHC. The collected data correspond to an integrated luminosity of 3.2 fb−1. The W±Z candidates are reconstructed using leptonic decays of the gauge bosons into electrons or muons. The measured inclusive cross section in the detector fiducial region for leptonic decay modes is σW±Z→ℓ′νℓℓ fid.=63.2±3.2(stat.)±2.6(sys.)±1.5(lumi.) fb. In comparison, the next-to-leading-order Standard Model prediction is 53.4−2.8 +3.6 fb. The extrapolation of the measurement from the fiducial to the total phase space yields σW±Z tot.=50.6±2.6(stat.)±2.0(sys.)±0.9(th.)±1.2(lumi.) pb, in agreement with a recent next-to-next-to-leading-order calculation of 48.2−1.0 +1.1 pb. The cross section as a function of jet multiplicity is also measured, together with the charge-dependent W+Z and W−Z cross sections and their ratio.
Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 762, 1-22 p.
IdentifiersURN: urn:nbn:se:kth:diva-197692DOI: 10.1016/j.physletb.2016.08.052ScopusID: 2-s2.0-84987971181OAI: oai:DiVA.org:kth-197692DiVA: diva2:1052944
QC 201612072016-12-072016-12-072016-12-07Bibliographically approved